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NCERT Class 11 Geography Chapter 9 Solar Radiation, Heat Balance and Temperature
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. CBSE Class 11 Geography Solutions are part of All Subject Solutions. Here we have given NCERT Class 11 Geography Part I: Fundamentals of Physical Geography, Part II: Indian: Physical Environment, Part III: Practical Work in Geography. NCERT Class 11 Geography Chapter 9 Solar Radiation, Heat Balance and Temperature Notes, NCERT Class 11 Geography Textbook Solutions for All Chapters, You can practice these here.
Solar Radiation, Heat Balance and Temperature
Chapter: 9
GEOGRAPY [ PART – I ]
TEXTUAL QUESTIONS ANSWERS
OBJECTIVE TYPE QUESTIONS
1. The sun is directly overhead at noon on 21st June at:
(a) The equator.
(b) 23.5° S.
(c) 23.5°N.
(d) 66.5°N.
Ans. (a) The equator.
2. In which one of the following cities, are the days the longest?
(a) Thiruvananthapuram.
(b) Chandigarh.
(c) Hyderabad.
(d) Nagpur.
Ans. (a) Thiruvananthapuram.
3. The atmosphere is mainly heated by the:
(a) Short wave solar radiation.
(b) Reflected solar radiation.
(c) Long wave terrestrial radiation.
(d) Scattered solar radiation.
Ans. (c) Long wave terrestrial radiation.
4. The main reason that the earth experiences highest temperatures in the subtropics in the Northern Hemisphere rather than at the equator is:
(a) Subtropical areas tend to have less cloud cover than equatorial areas.
(b) Subtropical areas have longer day hours in the summer than the equatorial.
(c) Subtropical areas have an enhanced “green house effect” compared to equatorial areas.
(d) Subtropical areas are nearer to the oceanic areas than the equatorial locations.
Ans. (a) Subtropical areas tend to have less cloud cover than equatorial areas.
5. The lines joining the placés of equal temperature are:
(a) isotherms.
(b) isobars.
(c) degree celcius lines.
(d) none.
Ans. (a) isotherms.
6. The incoming solar radiation in the form of short waves is called:
(a) insolation.
(b) convection.
(c) conduction.
(d) none.
Ans. (a) insolation.
7. The balance of incoming and outgoing radiation is:
(a) solar energy.
(b) heat balance.
(c) terrestrial radiation.
(d) none.
Ans. (b) heat balance.
8. Angle made by the rays of the sun on the earth surface is called the:
(a) angle of incidence.
(b) albedo of the earth.
(c) angle of the earth.
(d) none.
Ans. (a) angle of incidence.
9. The sun is vertically overhead at noon on 21st June at
(a) the equator.
(b) 23.5° N.
(c) 23.5° S.
(d) 66.5° N.
Ans. (b) 23.5° N.
10. The days are longest at
(a) Thiruvananthapuram.
(b) Hyderabad.
(c) Chandigarh.
(d) Nagpur.
Ans. (a) Thiruvananthapuram.
11. This process of vertical heating of the atmosphere is known as ____________.
(a) Psychrometer.
(b) Convection.
(c) Evaporation.
(d) None of the above.
Ans. (b) Convection.
12. Differences in pressure on the earth surface causes:
(a) Winds.
(b) Precipitation.
(c) Hail.
(d) Seasons.
Ans. (a) Winds.
13. ___________ are lines joining places having an equal temperature.
(a) Isotherms.
(b) Evaporation.
(c) Convection.
(d) Pyrheliometer.
Ans. (a) Isotherms.
14. The heat energy absorbed by a known area in a fixed time is determined with the help of an instrument called
(a) Psychrometer.
(b) Pyrheliometer.
(c) Thermometric well.
(d) Any instrument.
Ans. (b) Pyrheliometer.
15. What is Isotherm?
(a) The line joining the places of equal temperature.
(b) The incoming short wave radiation.
(c) The line joining the places of equal pressure.
(d) None of the above.
Ans. (a) The line joining the places of equal temperature.
16. The earth radiates energy to the atmosphere in:
(a) Long wavelengths.
(b) Radiation.
(c) Insolation.
(d) Short wavelengths.
Ans. (a) Long wavelengths.
17. Maximum insolation is received over the ____________.
(a) Equator.
(b) Tropical areas.
(c) Sub-tropical areas.
(d) Poles.
Ans. (c) Sub-tropical areas.
18. Insolation refers to ____________.
(a) Wind direction.
(b) Solar radiation.
(c) Precipitation.
(d) None of the above.
Ans. (b) Solar radiation.
19. What percent of sunrays that is received by the upper layer of the atmosphere reach the earth surface?
(a) 43%
(b) 51%
(c) 53%
(d) 40%
Ans. (b) 51%.
20. The process of heating up of land through horizontal movement of heat is called:
(a) Conduction.
(b) Convection.
(c) Advection.
(d) Air drainage.
Ans. (a) Conduction.
II. Fill in the blanks:
(i) The incoming solar radiation is called ____________.
Ans. Insolation.
(ii) The outgoing heat energy from surface of the earth is called ____________.
Ans. Terrestrial radiation.
(iii) The balance of incoming and outgoing radiation is called ____________.
Ans. Heat Budget.
(iv) Intensity of heat is called ____________.
Ans. Radiation.
(v) The imaginary lines having the equal temperature reduced to sea level are called ____________.
Ans. Isotherms.
III. Make correct pairs from the following two columns.
| (i) Insolation | (a) The difference between the mean temperature of the warmest and the coldest months. |
| (ii) Albedo | (b) The lines joining the places of equal temperature |
| (iii) Isotherms | (c) The incoming solar radiation |
| (iv) Annual range | (d) The percentage of visible light reflected by an object. |
Ans.
| (i) Insolation | (a) The difference between the mean temperature of the warmest and the coldest months. |
| (ii) Albedo | (d) The percentage of visible light reflected by an object. |
| (iii) Isotherms | (b) The lines joining the places of equal temperature |
| (iv) Annual range | (a) The difference between the mean temperature of the warmest and the coldest months. |
